The Obama campaign has released a new television advertisement targeting Mitt Romney over his record at Bain Capital.

The two-minute ad will run in Ohio, Pennsylvania, Colorado and Virginia. It features a Kansas City steel plant purchased by Bain Capital which shut it down after making a large profit. “They came in and sucked the life out of us,” one of the plant’s former workers says in the ad.

“If he’s going to run the country the way he ran his business, I wouldn’t want him there,” says another.

The ad signals a concerted attempt by the Obama campaign to define its Republican opponent.

The presidential election takes place on November 4, in just under six months time.

UPDATE – May 16 – The Romney campaign has released this video in response.